Abstract
A microbiological method is described for the production of xylitol, which is used as a sugar substitute for diabetics. A sequential fermentation process yielded 9.0 g of xylitol from 77.5 g of glucose via D-arabitol and D-xylulose. Candida guilliermondii var. soya (ATCC 20216) consumed 5.1 g of D-xylulose and produced 2.8 g of xylitol per 100 ml. Pentitol production from D-xylulose by yeasts was divided into three types: I, yeast-produced xylitol; II, yeast-produced D-arabitol; and III, yeast-produced xylitol and D-arabitol. D-Xylulose, but not glucose, was dissimilated to xylitol by yeasts under aerobic conditions.
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